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            <td width="10%" class="headerItem">Current view:</td>
            <td width="35%" class="headerValue"><a href="../../../index.html">top level</a> - <a href="index.html">src/caffe/layers</a> - slice_layer.cpp<span style="font-size: 80%;"> (source / <a href="slice_layer.cpp.func-sort-c.html">functions</a>)</span></td>
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            <td class="headerItem">Test:</td>
            <td class="headerValue">code analysis</td>
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            <td class="headerItem">Lines:</td>
            <td class="headerCovTableEntry">2</td>
            <td class="headerCovTableEntry">67</td>
            <td class="headerCovTableEntryLo">3.0 %</td>
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            <td class="headerItem">Date:</td>
            <td class="headerValue">2020-09-11 22:25:26</td>
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            <td class="headerItem">Functions:</td>
            <td class="headerCovTableEntry">2</td>
            <td class="headerCovTableEntry">16</td>
            <td class="headerCovTableEntryLo">12.5 %</td>
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            <td class="headerValueLeg">            Lines:
            <span class="coverLegendCov">hit</span>
            <span class="coverLegendNoCov">not hit</span>
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<pre class="sourceHeading">          Line data    Source code</pre>
<pre class="source">
<a name="1"><span class="lineNum">       1 </span>            : #include &lt;algorithm&gt;</a>
<span class="lineNum">       2 </span>            : #include &lt;vector&gt;
<span class="lineNum">       3 </span>            : 
<span class="lineNum">       4 </span>            : #include &quot;caffe/layers/slice_layer.hpp&quot;
<span class="lineNum">       5 </span>            : #include &quot;caffe/util/math_functions.hpp&quot;
<span class="lineNum">       6 </span>            : 
<span class="lineNum">       7 </span>            : namespace caffe {
<span class="lineNum">       8 </span>            : 
<span class="lineNum">       9 </span>            : template &lt;typename Dtype&gt;
<span class="lineNum">      10 </span><span class="lineNoCov">          0 : void SliceLayer&lt;Dtype&gt;::LayerSetUp(const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; bottom,</span>
<span class="lineNum">      11 </span>            :       const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; top) {
<span class="lineNum">      12 </span>            :   const SliceParameter&amp; slice_param = this-&gt;layer_param_.slice_param();
<span class="lineNum">      13 </span><span class="lineNoCov">          0 :   CHECK(!(slice_param.has_axis() &amp;&amp; slice_param.has_slice_dim()))</span>
<span class="lineNum">      14 </span>            :       &lt;&lt; &quot;Either axis or slice_dim should be specified; not both.&quot;;
<span class="lineNum">      15 </span>            :   slice_point_.clear();
<span class="lineNum">      16 </span><span class="lineNoCov">          0 :   std::copy(slice_param.slice_point().begin(),</span>
<span class="lineNum">      17 </span>            :       slice_param.slice_point().end(),
<span class="lineNum">      18 </span>            :       std::back_inserter(slice_point_));
<span class="lineNum">      19 </span><span class="lineNoCov">          0 : }</span>
<span class="lineNum">      20 </span>            : 
<span class="lineNum">      21 </span>            : template &lt;typename Dtype&gt;
<span class="lineNum">      22 </span><span class="lineNoCov">          0 : void SliceLayer&lt;Dtype&gt;::Reshape(const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; bottom,</span>
<span class="lineNum">      23 </span>            :       const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; top) {
<span class="lineNum">      24 </span><span class="lineNoCov">          0 :   const int num_axes = bottom[0]-&gt;num_axes();</span>
<span class="lineNum">      25 </span>            :   const SliceParameter&amp; slice_param = this-&gt;layer_param_.slice_param();
<span class="lineNum">      26 </span><span class="lineNoCov">          0 :   if (slice_param.has_slice_dim()) {</span>
<span class="lineNum">      27 </span><span class="lineNoCov">          0 :     slice_axis_ = static_cast&lt;int&gt;(slice_param.slice_dim());</span>
<span class="lineNum">      28 </span>            :     // Don't allow negative indexing for slice_dim, a uint32 -- almost
<span class="lineNum">      29 </span>            :     // certainly unintended.
<span class="lineNum">      30 </span><span class="lineNoCov">          0 :     CHECK_GE(slice_axis_, 0) &lt;&lt; &quot;casting slice_dim from uint32 to int32 &quot;</span>
<span class="lineNum">      31 </span>            :         &lt;&lt; &quot;produced negative result; slice_dim must satisfy &quot;
<span class="lineNum">      32 </span>            :         &lt;&lt; &quot;0 &lt;= slice_dim &lt; &quot; &lt;&lt; kMaxBlobAxes;
<span class="lineNum">      33 </span><span class="lineNoCov">          0 :     CHECK_LT(slice_axis_, num_axes) &lt;&lt; &quot;slice_dim out of range.&quot;;</span>
<span class="lineNum">      34 </span>            :   } else {
<span class="lineNum">      35 </span><span class="lineNoCov">          0 :     slice_axis_ = bottom[0]-&gt;CanonicalAxisIndex(slice_param.axis());</span>
<span class="lineNum">      36 </span>            :   }
<span class="lineNum">      37 </span><span class="lineNoCov">          0 :   vector&lt;int&gt; top_shape = bottom[0]-&gt;shape();</span>
<span class="lineNum">      38 </span><span class="lineNoCov">          0 :   const int bottom_slice_axis = bottom[0]-&gt;shape(slice_axis_);</span>
<span class="lineNum">      39 </span><span class="lineNoCov">          0 :   num_slices_ = bottom[0]-&gt;count(0, slice_axis_);</span>
<span class="lineNum">      40 </span><span class="lineNoCov">          0 :   slice_size_ = bottom[0]-&gt;count(slice_axis_ + 1);</span>
<span class="lineNum">      41 </span>            :   int count = 0;
<span class="lineNum">      42 </span><span class="lineNoCov">          0 :   if (slice_point_.size() != 0) {</span>
<span class="lineNum">      43 </span><span class="lineNoCov">          0 :     CHECK_EQ(slice_point_.size(), top.size() - 1);</span>
<span class="lineNum">      44 </span><span class="lineNoCov">          0 :     CHECK_LE(top.size(), bottom_slice_axis)</span>
<span class="lineNum">      45 </span><span class="lineNoCov">          0 :         &lt;&lt; &quot;slice axis: &quot; &lt;&lt; slice_axis_</span>
<span class="lineNum">      46 </span><span class="lineNoCov">          0 :         &lt;&lt; &quot;, bottom[0] shape: &quot; &lt;&lt; bottom[0]-&gt;shape_string();</span>
<span class="lineNum">      47 </span>            :     int prev = 0;
<span class="lineNum">      48 </span>            :     vector&lt;int&gt; slices;
<span class="lineNum">      49 </span><span class="lineNoCov">          0 :     for (int i = 0; i &lt; slice_point_.size(); ++i) {</span>
<span class="lineNum">      50 </span><span class="lineNoCov">          0 :       CHECK_GT(slice_point_[i], prev);</span>
<span class="lineNum">      51 </span><span class="lineNoCov">          0 :       slices.push_back(slice_point_[i] - prev);</span>
<span class="lineNum">      52 </span><span class="lineNoCov">          0 :       prev = slice_point_[i];</span>
<span class="lineNum">      53 </span>            :     }
<span class="lineNum">      54 </span><span class="lineNoCov">          0 :     slices.push_back(bottom_slice_axis - prev);</span>
<span class="lineNum">      55 </span><span class="lineNoCov">          0 :     for (int i = 0; i &lt; top.size(); ++i) {</span>
<span class="lineNum">      56 </span><span class="lineNoCov">          0 :       top_shape[slice_axis_] = slices[i];</span>
<span class="lineNum">      57 </span><span class="lineNoCov">          0 :       top[i]-&gt;Reshape(top_shape);</span>
<span class="lineNum">      58 </span><span class="lineNoCov">          0 :       count += top[i]-&gt;count();</span>
<span class="lineNum">      59 </span>            :     }
<span class="lineNum">      60 </span>            :   } else {
<span class="lineNum">      61 </span><span class="lineNoCov">          0 :     CHECK_EQ(bottom_slice_axis % top.size(), 0)</span>
<span class="lineNum">      62 </span>            :         &lt;&lt; &quot;Number of top blobs (&quot; &lt;&lt; top.size() &lt;&lt; &quot;) should evenly &quot;
<span class="lineNum">      63 </span><span class="lineNoCov">          0 :         &lt;&lt; &quot;divide input slice axis (&quot; &lt;&lt; bottom_slice_axis &lt;&lt; &quot;)&quot;;</span>
<span class="lineNum">      64 </span><span class="lineNoCov">          0 :     top_shape[slice_axis_] = bottom_slice_axis / top.size();</span>
<span class="lineNum">      65 </span><span class="lineNoCov">          0 :     for (int i = 0; i &lt; top.size(); ++i) {</span>
<span class="lineNum">      66 </span><span class="lineNoCov">          0 :       top[i]-&gt;Reshape(top_shape);</span>
<span class="lineNum">      67 </span><span class="lineNoCov">          0 :       count += top[i]-&gt;count();</span>
<span class="lineNum">      68 </span>            :     }
<span class="lineNum">      69 </span>            :   }
<span class="lineNum">      70 </span><span class="lineNoCov">          0 :   CHECK_EQ(count, bottom[0]-&gt;count());</span>
<span class="lineNum">      71 </span><span class="lineNoCov">          0 :   if (top.size() == 1) {</span>
<span class="lineNum">      72 </span><span class="lineNoCov">          0 :     top[0]-&gt;ShareData(*bottom[0]);</span>
<span class="lineNum">      73 </span><span class="lineNoCov">          0 :     top[0]-&gt;ShareDiff(*bottom[0]);</span>
<span class="lineNum">      74 </span>            :   }
<span class="lineNum">      75 </span><span class="lineNoCov">          0 : }</span>
<span class="lineNum">      76 </span>            : 
<span class="lineNum">      77 </span>            : template &lt;typename Dtype&gt;
<span class="lineNum">      78 </span><span class="lineNoCov">          0 : void SliceLayer&lt;Dtype&gt;::Forward_cpu(const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; bottom,</span>
<span class="lineNum">      79 </span>            :       const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; top) {
<span class="lineNum">      80 </span><span class="lineNoCov">          0 :   if (top.size() == 1) { return; }</span>
<span class="lineNum">      81 </span>            :   int offset_slice_axis = 0;
<span class="lineNum">      82 </span><span class="lineNoCov">          0 :   const Dtype* bottom_data = bottom[0]-&gt;cpu_data();</span>
<span class="lineNum">      83 </span><span class="lineNoCov">          0 :   const int bottom_slice_axis = bottom[0]-&gt;shape(slice_axis_);</span>
<span class="lineNum">      84 </span><span class="lineNoCov">          0 :   for (int i = 0; i &lt; top.size(); ++i) {</span>
<span class="lineNum">      85 </span><span class="lineNoCov">          0 :     Dtype* top_data = top[i]-&gt;mutable_cpu_data();</span>
<span class="lineNum">      86 </span><span class="lineNoCov">          0 :     const int top_slice_axis = top[i]-&gt;shape(slice_axis_);</span>
<span class="lineNum">      87 </span><span class="lineNoCov">          0 :     for (int n = 0; n &lt; num_slices_; ++n) {</span>
<span class="lineNum">      88 </span><span class="lineNoCov">          0 :       const int top_offset = n * top_slice_axis * slice_size_;</span>
<span class="lineNum">      89 </span>            :       const int bottom_offset =
<span class="lineNum">      90 </span><span class="lineNoCov">          0 :           (n * bottom_slice_axis + offset_slice_axis) * slice_size_;</span>
<span class="lineNum">      91 </span><span class="lineNoCov">          0 :       caffe_copy(top_slice_axis * slice_size_,</span>
<span class="lineNum">      92 </span>            :           bottom_data + bottom_offset, top_data + top_offset);
<span class="lineNum">      93 </span>            :     }
<span class="lineNum">      94 </span><span class="lineNoCov">          0 :     offset_slice_axis += top_slice_axis;</span>
<span class="lineNum">      95 </span>            :   }
<span class="lineNum">      96 </span>            : }
<span class="lineNum">      97 </span>            : 
<span class="lineNum">      98 </span>            : template &lt;typename Dtype&gt;
<span class="lineNum">      99 </span><span class="lineNoCov">          0 : void SliceLayer&lt;Dtype&gt;::Backward_cpu(const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; top,</span>
<span class="lineNum">     100 </span>            :       const vector&lt;bool&gt;&amp; propagate_down, const vector&lt;Blob&lt;Dtype&gt;*&gt;&amp; bottom) {
<span class="lineNum">     101 </span><span class="lineNoCov">          0 :   if (!propagate_down[0] || top.size() == 1) { return; }</span>
<span class="lineNum">     102 </span>            :   int offset_slice_axis = 0;
<span class="lineNum">     103 </span><span class="lineNoCov">          0 :   Dtype* bottom_diff = bottom[0]-&gt;mutable_cpu_diff();</span>
<span class="lineNum">     104 </span><span class="lineNoCov">          0 :   const int bottom_slice_axis = bottom[0]-&gt;shape(slice_axis_);</span>
<span class="lineNum">     105 </span><span class="lineNoCov">          0 :   for (int i = 0; i &lt; top.size(); ++i) {</span>
<span class="lineNum">     106 </span><span class="lineNoCov">          0 :     const Dtype* top_diff = top[i]-&gt;cpu_diff();</span>
<span class="lineNum">     107 </span><span class="lineNoCov">          0 :     const int top_slice_axis = top[i]-&gt;shape(slice_axis_);</span>
<span class="lineNum">     108 </span><span class="lineNoCov">          0 :     for (int n = 0; n &lt; num_slices_; ++n) {</span>
<span class="lineNum">     109 </span><span class="lineNoCov">          0 :       const int top_offset = n * top_slice_axis * slice_size_;</span>
<span class="lineNum">     110 </span>            :       const int bottom_offset =
<span class="lineNum">     111 </span><span class="lineNoCov">          0 :           (n * bottom_slice_axis + offset_slice_axis) * slice_size_;</span>
<span class="lineNum">     112 </span><span class="lineNoCov">          0 :       caffe_copy(top_slice_axis * slice_size_,</span>
<span class="lineNum">     113 </span>            :           top_diff + top_offset, bottom_diff + bottom_offset);
<span class="lineNum">     114 </span>            :     }
<span class="lineNum">     115 </span><span class="lineNoCov">          0 :     offset_slice_axis += top_slice_axis;</span>
<span class="lineNum">     116 </span>            :   }
<span class="lineNum">     117 </span>            : }
<a name="118"><span class="lineNum">     118 </span>            : </a>
<span class="lineNum">     119 </span>            : #ifdef CPU_ONLY
<span class="lineNum">     120 </span><span class="lineNoCov">          0 : STUB_GPU(SliceLayer);</span>
<span class="lineNum">     121 </span>            : #endif
<span class="lineNum">     122 </span>            : 
<span class="lineNum">     123 </span>            : INSTANTIATE_CLASS(SliceLayer);
<a name="124"><span class="lineNum">     124 </span><span class="lineCov">          3 : REGISTER_LAYER_CLASS(Slice);</span></a>
<span class="lineNum">     125 </span>            : 
<span class="lineNum">     126 </span><span class="lineCov">          3 : }  // namespace caffe</span>
</pre>
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